Please, Sir, Buy My Trombone!

To get you to buy a trombone, the Trombone Salesman will get you to try a trombone.
“I assure you: the reeds are clean,” he says, placing the trombone to your lips. “Now blow.”
Sure, you do not know how to play it, but one is at your lips. Your hands clutch the instrument, your fingers work the valves and slide.
“Now blow,” he repeats.
And so, you do.
The most horrible sound rushes out of the device.
Children scream.
Dogs howl.
Glass shatters.
The Trombone Salesman tries to take it back.
You refuse. “I’ll take it,” you say, grinning.